dt-bindings: firmware: imx: add property reset-controller

System Controller Firmware(SCU) reset some peripherals, such as CSI. So add
reset-controller for it.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: "Rob Herring (Arm)" <robh@kernel.org>
Link: https://lore.kernel.org/r/20250210-8qxp_camera-v3-1-324f5105accc@nxp.com
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Documentation/devicetree/bindings/firmware/fsl,scu.yaml

@@ -45,6 +45,18 @@ properties:
       Keys provided by the SCU
     $ref: /schemas/input/fsl,scu-key.yaml
 
+  reset-controller:
+    type: object
+    properties:
+      compatible:
+        const: fsl,imx-scu-reset
+      '#reset-cells':
+        const: 1
+    required:
+      - compatible
+      - '#reset-cells'
+    additionalProperties: false
+
   mboxes:
     description:
       A list of phandles of TX MU channels followed by a list of phandles of